- to add (something extra) at no additional cost
- to contribute or interpose (a remark, argument, etc), esp in a discussion
- throw in one's hand
- (in cards) to concede defeat by putting one's cards down
- to give in and accept defeat; discontinue a venture
- throw in the towel or throw in the sponge
- (in boxing) to concede defeat by the throwing of a towel (or sponge) into the ring by a second
- to give in and accept defeat; discontinue a venture
- the method of putting the ball into play after it has gone into touch by throwing it two-handed from behind the head, both feet being kept on the ground
