Green’s Dictionary of Slang

1. excrement.

1979		J. Morrow Confessions of Proinsias O’Toole 118: ‘He’ll not be able to go for a crap without the Liberals’ say-so,’ stated Steffers graphically. ‘Say “keek”, my love, not “crap”.’.
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: keech n. Crap; kak.

2. nonsense, rubbish.

1995		I. Rankin Let It Bleed 143: That’s just so much keech, Flower.
2000		T. Udo Vatican Bloodbath 66: God and Jesus and aw’ that keech.