Sketch

exp.

Heard in Wicklow, Cork, Mayo, Dublin, Sligo and Tipperary

1) the act of keeping a lookout. 2) an exclamation used by a lookout to warn that someone is approaching.

In use

I'll rob the apples, you keep sketch. Sketch!

Posh English

I shall purloin the apples whilst you keep lookout. Look out! Someone approaches!

Same phrase, other counties