The speaker was referring to a particularly difficult person at a management meeting.  The concept here was to throw others he was sucking into his plan under the bus and try to shift the blame, or pull them under with him .  And then management would have to call him on the carpet.  This malaphor trifecta is a mash up of “sweep under the carpet”  (hide something), “pull someone under” (to cause someone to fail), and “throw (someone) under the bus” (to sacrifice a friend or ally for selfish reasons).  A hip, hip, hip, hooray to Yvonne Stam for hearing this one and passing it on.