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1.
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
Word on the street is that hot blonde girl's been securing the lid
by AmyWinehouse223 July 28, 2011