undroppable adjective 1noun 1forms 1 adjective1 •Unable to be dropped (from a team selection)He will react in the way he generally does, training feverishly over the weeks ahead and attempting to make himself undroppable for the game on Merseyside. — 2015 noun1 •A player who is unable to be dropped (from a team selection)United have two midfield undroppables vs RB Leipzig — 2020 formsundroppables