When playing Texas Hold 'em poker. The player with the small and big blinds put the blinds into one(for example if one of the players needs change from the blind)
Small blind is £100, Big blind is £200. Big blind puts in 2 £100 chips, small blind only has a £200 chip. They put the £200 chip in and take £100 change from big blind, the blinds are now combined or as we call it at our regular game "comblind"