— swapper , n.
/swop/ , v. , swapped, swapping , n.
v.t.
1. to exchange, barter, or trade, as one thing for another: He swapped his wrist watch for the radio.
v.i.
2. to make an exchange.
n.
3. an exchange: He got the radio in a swap.
Also, swop .
[ 1300-50; ME swappen to strike, strike hands (in bargaining); c. dial. G schwappen to box (the ears) ]