x1 is an aggressive mimic of x2 in form x3 by method x4.
Copied from MoheXoheKohe's definition of oljytamfu'i, which saves a syllable when «olj» is a rafsi for olju, e.g. if fu'ivla are constrained so that no two fu'ivla differ only by their final vowel, this version is a lujvo from «olju tarmi fukpi» which does not require this proposal. It is a syllable longer. See also justamfu'i, olju, fukpi, tamsmi.