You, who boast of playing the game, and not fouling the pitch!
Against this fouling of the stream at its source, society must protect itself.
A bit of fouling, metal from cartridges or bullet, “proud cap,” or thick cartridge-head may cause this.
If he does any fouling in this fight I'll make him quit or declare him out.
As the lake was public property, it was not easy for the two "fouling" boys to find opportunities for practising their parts.
Burton set himself for the next one, and succeeded only in fouling it off.
With incandescent electric light there is no combustion and no fouling of the air.
She lit a cigarette and said, "Now—how the hell are you fouling up the computers?"
Time and time again I was thrown off by fouling the side of the rut and plunged headlong over the handlebars into the road.
The boche was fouling Troolan in a way that would be prohibited in wrestling.
Old English ful "rotten, unclean, vile, corrupt, offensive to the senses," from Proto-Germanic *fulaz (cf. Old Saxon and Old Frisian ful, Middle Dutch voul, Dutch vuil, Old High German fül, German faul, Gothic füls), from root *fu-, corresponding to PIE *pu-, perhaps from the sound made in reaction to smelling something bad (cf. Sanskrit puyati "rots, stinks," putih "foul, rotten;" Greek puon "discharge from a sore;" Latin pus "putrid matter," putere "to stink," putridus "rotten;" Lithuanian puviu "to rot").
Old English ful occasionally meant "ugly" (as contrasted with fæger (adj.), modern fair (adj.)), a sense frequently found in Middle English, and the cognate in Swedish is the usual word for "ugly." Of weather, first recorded late 14c. In the sporting sense of "irregular, unfair" it is first attested 1797, though foul play is recorded from mid-15c. Baseball sense of "out of play" attested by 1860. Foulmart was a Middle English word for "polecat" (from Old English mearð "marten").
Old English fulian "to become foul, rot," from ful (see foul (adj.)). Related: Fouled; fouling.