A pun I feel stupid for not understanding

Ok? in red and underlined

Phalic cloaked man

Big Red N

Someone going through portals realised they really had to take a dump

Harry Potter the noodle armed bird

Someone forgot how many rings are used in the Olympic logo

Yolo, written in Gothic font

A beautiful blond lady.

Muscular report cards

Nice nose Elvis.

...I don't want to know what you're grabbing that flag with...