A man whose natural impulse when faced with any sort of aggression of disagreement of any kind is to tuck his penis and balls as far between his leg as possible (to give the appearance of a vagina) and hope the problem goes away. Social 'wokeness' is a major motivator for this behavior. They may or may not attempt to take petty 'anonymous' revenge - either in the form of vandalism or an attempt to online shame. Your average tuckboy venerates journalists.

Tuckboys are physically weak, effete, and are terrified at being called upon to be responsible and take a lead in ANYTHING. They are not as uniform in their appearance as the cuck - though there is some overlap. Normal people are often disgusted to find out someone close to them is a tuckboy, usually as a result of their behavior in an emergency.

Please note women can NEVER be tuckboys (for obvious reasons) and it is extremely rare to find any non-white tuckboys.
'Instead of asking him in the first instance to just respect the library 'quiet study zone', Taylor just snuck a picture of him and falsely claimed he was being racist. He's such a tuckboy'

'Carl might have picketed that old Christian widow from giving hot chocolate to drunks, and chased her draped in the pride flag but when those fundamentalist Muslims started spouting homophobia, he looked the other way. Typical tuckboy.

Any white man who watched the full two-hour video of the Covington High School kids and then proceeded to give a 'Yeah but...' is a tuckboy.
by SoyTuck January 30, 2019
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