The Collaborative International Dictionary
to get a word in edgewise
Edgeways \Edge"ways\, Edgewise \Edge"wise\, adv. With the edge towards anything; in the direction of the edge.
to get a word in edgewise to succeed in expressing an opinion in a conversation, in spite of constant speech from another or others; as, he talked incessantly and I couldn't get a word in edgewise.
Note: the form edgeways is now uncommon.
Glad to get in a word, as they say, edgeways.
--Sir W.
Scott.