The phrase "fellow relegation" refers to a situation where two or more teams are at risk of being demoted or moved to a lower position in a sports league. It means that multiple teams are facing the same possibility of being relegated.
Watford have won their last two games to pull away from the relegation dogfight, but they were both against fellow relegation candidates. (justarsenal.com)
A late equalizer on the weekend may have helped Gareth Southgate's side to avoid defeat against fellow relegation threatened Portsmouth but i feel it is more than likely that Boro will not beat the drop which means that the fate of this much speculated winger will be a lot clearer. (caughtoffside.com)
Dropping down a division, Angelino came on during the second half for Mallorca in their 1 - 1 draw with fellow relegation battlers Cordoba. (mancity.com)