(simile) like a bull in a china shop

(simile) very suddenly and incongruously

(informal) and that's final, and that's that, and that's flat, full stop, period, end of discussion

to hit a snag, to find a fly in the ointment

(simile) Be a heavy smoker; smoke like a chimney

(vulgar) to jerk off, to masturbate

(simile) Extremely ugly; ugly as sin; looking like the back end of a bus

(simile) stark naked; naked as a jaybird

(Quebec, simile) very agitated out of excitation or anxiousness

(simile, vulgar) Very stupid; thick as a brick; dumb as a post