1. [early 18C] kissing [echoic of the exchange of spittle].
2. in pl., as a drink.
(a) [early 18C] a non-alcoholic drink taken for medicinal purposes.
(b) [late 18C–early 19C] any form of soft drink, esp. tea; also attrib.
(c) [mid-19C] (also slippy sloppy) any drink.
3. [1960s+] (S.Afr., also slop) a thong sandal [the noise it makes as one walks].