Probably a compound of mere (“body of water”) + blob. <span class="searchmatch">mareblob</span> (plural <span class="searchmatch">mareblobs</span>) (obsolete) The plant Caltha palustris kingcup marsh marigold...
<span class="searchmatch">mareblobs</span> plural of <span class="searchmatch">mareblob</span>...
blobocracy blob of death blobplot blobular blob-wore cold blob glob horse blob <span class="searchmatch">mareblob</span> moeblob on the blob water-blob shapeless or amorphous mass cluster blob...