腿了

tuǐle
(Tw) (Internet slang) too late, someone posted that already (supposedly from "lag" misspelled as "leg")

CEDICT

taiwan internet slang

Entry Composition

=1 腿 tuǐ leg

classifier: 條
=1 腿 tuǐ
  1. hip bone
  2. old variant of 腿 tuǐ
2 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)