u'ivla fu'ivla

x₁ is a word meaning x₂ in language x₃ and silly/funny/clever for reason x₄ (usually etymological).

The word u'ivla is itself an u'ivla, as it is an unconventional portmanteau of u'i and -vla- (a rafsi of valsi) and also a pun on the word fu'ivla. Another example is u'imla.

jbovlaste

In notes:

clakemkamymeckezrai: x₁ (object/dimension) is shortest among set x₂ (set) in respective dimensions x₃ (default: the longest for each).
le'avla: v₁ is a loanword meaning v₂ in language v₃ based on foreign-language word l₂.
pavyslakycmavy'inda: x₁ (si'o / proposed-or-existing cmavo) deserves a monosyllabic cmavo x₂, even though language x₃ (default Lojban) is running out of cmavo space, because of letteral-manipulation cmavo x₄ and other-rarely-used cmavo x₅, and it must have that monosyllabic cmavo at time x₆ (default: lo ca'abna), [insert expletive x₇ (default zo mabla)] it!
pesymiste: x₁=m₁=p₁ is a pessimist, with thoughts x₂=m₂=p₂.
sezyskivla: x₁ is an autonym (word that describes itself) meaning x₂ in language x₃
zi'evla: x₁=v₁=z₁ is an irregular/free-form content word meaning x₂=v₂=z₂ in language x₃=v₃ (usually Lojban); x₁ is a stage-4 or stage-3 fu'ivla.
zilziljbo: x₀: Lojban is love, Lojban is life. (nullary predicate)
snafu: x₁ is a fucked up/snafu/gaffe/messed up (wrong) event/situation caused by x₂ by standard x₃; x₂ fucks up in doing or by causing x₁.
a'oi (exp!): vocative: slightly piratical greetings
co'e'o'e: Elliptical elliptical. Beware, its grammar is also elliptical.
ii'au (exp!): attitudinal: yee-haw!
ni'u'u (exp!): scalar negator: not at all, no way
o'ai (exp!): vocative: slightly surprised greetings
.akme: x₁ is a knockoff/off-brand version of product x₂.
au'unmro: x₁ finds x₂ so powerfully cute they (metaphorically) die from cuteness
banckle: x₁ is a dialect of language x₂ which is weird or alien to x₃ and which is used by x₄.
bangrnozmi'o'o'i'o'i'i'o'e'au'ai'u'u'o'o'o'i'i'o'o'i'o'i'o'i'o'i'o'o'i'e'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au'au: x₁ is the set of all languages with defined ISO 639-3 codes
cma'e'i'o'uvo: x₁ is an obscure experimental cmavo that nobody uses, of selma'o x₂ (probably also experimental), with meaning/function x₃ in usage (language) x₄
ipna: x₁ eeps / is eeping
kerfrcampu: x₁ (quantity) is a hair cleaning/care/maintenance/styling substance/product for purpose x₂ of composition x₃; x₁ is a quantity of hair product
klatubradanikto: x₁ (object, process, quote, etc.) is a fail-safe mechanism/command or safe-word which halts activity x₂ (nu) and produces outcome x₃ (nu).
malglikslu: x₁ is an especially inappropriate anglicism made by x₂, inappropriate according to x₃
ra'oijbo: x₁ is someone who constantly annoyingly reminds other Lojbanists including x₂ to not forget about mandatory pauses in speech
tsatmatatnaxtsa'a: x₁ adds a pinch of x₂ to x₃ with intention to increase x₄ (property of x₃)
uivla: x₁ (text) is a zi'evla made of UI cmavos, optional glue, and a rafsi or piece of a gismu; meaning x₂ (ka) in language x₃.
xekcedipasocire: x₁ (nu) is the act of x₂ (person, entity, etc.) looking up the (definition vel sim. of the) word "xekcedipasocire" in dictionary/resource x₃.
zdalatukuuerpo'alegriiamakarenaketukuuerpo'espadarle'alegriiakosabuuenadalatukuuerpo'alegriiamakarena'eimakarena: x₁ dances the Macarena
coilojban: name: forgetful stubborn supporter of pre-Dotside Lojban.