Related to the term poisoned chalice (meaning something initially appearing good that later turns out to be a burden), a poisoned turd is something unpleasant that you have been forced to do/accept which later to turns out to be much worse than it initially seemed
James: When Tom got me to do that presentation for him, he neglected to mention that the entire departmental staff would be present and that the data were from the wrong fiscal quarter
After an evening of moderate drinking, Danger Beer is the beer that puts you over the edge to fully drunk and doubles the resultant hangover. You know you shouldn't have it but you can't resist one last beer before the night is over.
"Sorry I'm late, ended up having Danger Beer last night and couldn't find my pants this morning"