Grief.
You need to see it in the context of a Phil Lynott documentary. Phil unashamedly played up to his reputation as a womaniser, albeit usually with his tongue in his cheek (if not someone else's) viz. "Hey you good lookin' female. Come here!"
Clayton was no doubt trying to humorously reflect on this, but his choice of words does come across as "I'm going to finish this metaphor, no matter how deep a hole it needs..."