Shit in me mouth

A British expression regarding a moment or situation of grief - Used in scenarios when someone simply cannot comprehend

Doug: Oy bruv, my man is shacking me up with a broad, real peng one too. Problem is she’s a dyke.

Chris: A dyke? Shit in me mouth bruv. No sense in that.

I was hanging out curbside and a car drove by, splattering mud all over my rain jacket... shit in me mouth.