Putting a blockage on something; common phrases are:

securing YOUR lid: chastity, virginity, caution tape afront your 'woman hole'
securing HIS lid: use of a condom or other male birth control device
securing THE lid: the end of a long day; typically one that provokes fatigue and exhaustion

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.