Green’s Dictionary of Slang

1. to give up a share, lit. ‘dole up’.

1870

186518701875

1876

1864, 1867, 1870		Hotten Sl. Dict.
1876		C. Hindley Life and Adventures of a Cheap Jack 28: I have known men literally give their goods away, or to throw them at each other, which is termed ‘dolloping’.

2. (Irish) to adulterate.

1910

191019201930194019501960197019801990

1997

1910		P.W. Joyce Eng. As We Speak It In Ireland (1979) 248: That coffee is dolloped.
1997		Share Slanguage.