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.