Like if someone in England says something stupid instead of saying don't be daft they will say - don't be a Trump. Or if someone in Canada does something un cool or selfish instead of saying don't be a Hosser ay - they will say - Don't be a Trump ay. Cheers and happy weekend!
In this context Trump would be synonymous with chump (i.e., gullible). I like it!
There is already "Don't pull a Clinton."
Who cares? The masses don't care about sounding like fools; they mostly are.