(idiomatic) Slyly, in an inconspicuous manner, so as not to be seen; secretly; stealthily.

(transitive, informal) To add (fat, muscle, etc.) so as to increase mass or bulk.

(idiomatic) Used to indicate that a list continues in a similar manner.

(idiomatic) To profit from a craze; to join a trend.

Any very long, often also in other ways badly formed or even chaotic sentence.

(US, idiomatic) An expression of enthusiasm or encouragement.

Correct and apropos; perfectly true. / Alternative form of right-on.

(idiomatic) To feel grumpy and irritable; to be easily annoyed.

(idiomatic) Rapidly or immediately.

Used other than figuratively or idiomatically: see get, it, on. / (slang) To have sex. / (slang) To engage in a fight. / (idiomatic) To hurry up; to get a move on.