It's a slang term derived from American origin to replace
And mock Europe's fish n chip platter. The sea Seattle is your protein from the water while your forest roamer is your meat protein.
"Bullocks is blokes feasting a bangars n mash platter after giving his lady the ol in and out if ye'hungry as me after that deep sea squeeze im finnin to fix some Sea Seattle & Forest Roamer Aftaaa I Bone her"