Vouching for this (it was dead) as a fellow Briton, and commenting to explain:

'to trump' has the same meaning as 'to toot' in the complaints here - i.e. 'to fart'.

I.e. this isn't really partisan commentary or anything to flag - it's just amusing that a sort of competitor to the platform being criticised for calling its posts a slang term for farting is owned by someone whose name happens to be another one.

(And to be really clear, that slang term isn't somehow named for Trump, it predates him. Or certainly his international prominence anyway.)