自吹自擂

to blow one's own trumpet (idiom)

self / oneself / from / since / naturally / surely

to blow / to play a wind instrument / to blast / to puff / to boast / to brag / to end in failure / to fall through

to pound (with a mortar and pestle) / to hit (a person) / to beat (a drum) / to bang on (a door) / (dialect) to scold

(bound form) platform for a martial art contest / Taiwan pr. [lei2]