Someone who is soppy: overly emotional, overly romantic, and generally being a wuss. You wouldn't call yourself a sop, you'd call someone who wasn't being hard enough one. Commonly used in the UK.
Standing Operating Procedure (SOP) - Commonly and erroneously referred to as Standard Operating Procedure. Written military directives defining the actions to be taken upon the occurance of specific events.
In the event this unit receives female soldiers, SOP requires that the showers be monitored by the senior NCO. If the senior NCO is male, sunglasses will be issued to him by the Charge of Quarters.
Acronym for Semen on Picture. Similar to a Cum Tribute, SoP is the act of cumming on a picture of a female celebrity, anime character, hentai, video game character, or even a picture of a personal request. Can mostly be found on Pornhub or xhamster websites.
Standard Operating Procedure -- borrowed from military jargon; the favoured sexual position adopted by a couple that gets both off to mutual satisfaction when too tired to do anything new or complicated.