筒子

tǒngzi
  1. tube-shaped object
  2. tube
  3. bobbin
  4. (Internet slang) homonym for 同志 tóngzhì

CEDICT

internet slang

Entry Composition

=1 筒 tǒng
  1. tube
  2. cylinder
  3. to encase in sth cylindrical (such as hands in sleeves etc)
=1 筒 tǒng variant of 筒 tǒng
2 子 zi noun suffix, as in 椅子 yǐzi "chair"