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

(idiomatic) Very rarely; very infrequently.

(idiomatic) To figure out; to realize the truth.

(informal, idiomatic) To be very frightened, scared, or nervous.

(intransitive) To continue or persist, despite adversity or difficulty.

(idiomatic) to harm oneself; to suffer consequences of one's actions.

(intransitive, idiomatic) To proceed with the matter in hand.

when wishing for luck, or / when telling a lie (and attempting to escape the moral and other consequence of that lie).

(sports) A play in American football whereby the team performing the kick-off kicks the ball the minimum distance (ten yards in most levels of play) in an attempt to immediately regain possession of the ball.

To face a large task or project.