What is the meaning of Yt?

Alternative spelling of white (“Caucasian”).

Alternative spelling of whitey (“Caucasian person”).

Abbreviation of that.

alternative form of uit

your

out (out of fashion, not popular)

abbreviation of yhteistoiminta

alternative form of hit (“it”)

alternative form of hit (“it”)

introduces an indirect relative clause

alternative spelling of it: second-person singular of y

imperative of yte

third-person singular present indicative of etan

alternative form of it

first-person singular present of ite

third-person singular present of ite

imperative of ite

Source: wiktionary.org