searchwp-customizations.php

<?php
// @link https://searchwp.com/documentation/knowledge-base/comparing-index-source-mods/
add_filter( 'searchwp\query\mods', function( $mods ) {
	// Exclude Pages with 'coffee' in the Title.
	$source = \SearchWP\Utils::get_post_type_source_name( 'page' );
	$mod    = new \SearchWP\Mod( $source );

	$mod->set_where( [ [
		'column'  => 'post_title',
		'value'   => 'coffee',
		'compare' => 'LIKE',
	] ] );

	$mods[] = $mod;

	return $mods;
}, 30, 2 );