でかい is a casual word for 大きい. In rough speech the “ai” sound becomes “ee”: でかい → でけえ, just as うるさい → うるせえ. The short form でかっ! is an instant reaction to something big.
Use it withFriends OKCoworkers carefulBoss / teacher avoid
Casual and a bit rough. Common among friends; でけえ sounds rougher still.
195 lines with でかい/でけえ from 83 comedians in the library · Counts updated 2026-10-15
でかい/でけえ means “big, huge” (casual). でかい is a casual word for 大きい. In rough speech the “ai” sound becomes “ee”: でかい → でけえ, just as うるさい → うるせえ. The short form でかっ! is an instant reaction to something big.
Is でかい/でけえ rude? Who can you say it to?
With friends: OK. With coworkers: careful. With a boss or teacher: avoid. Casual and a bit rough. Common among friends; でけえ sounds rougher still.
How common is でかい/でけえ in real speech?
In 2,334 live comedy routines, でかい/でけえ appears in 195 lines from 83 comedians.